Scbew and nut turning device



Dec. 8, 1931. F. E; BERTRAND SCREW AND NUT TURNING DEVICE Filed March19,l 1929 /NVENTUR Patented Dec. 8, 1931 UNITED STATES PATENT OFFICEFREDERIC E. BERTRAND, F LYNN, MASSACHUSETTS, ASSIG-NOR TO UNITED SHOEMACHINERY' GOBPOBA-TION, OF PATEBSON, NEW JERSEY, A CORPORATIQN OF'NEWJERSEY SCREW AND NUT TURNING DEVICE Application led March 19, 1929.Serial No. 348,323.

This invention relates to screw and nut turnin devices and is hereinillustrated as embodied in a tool adapted to drive a heel fastening ofthe type disclosed in my copending application Serial No. 288,620, filedJune 27, 1928.

For the purposes of the present disclosure it is sufficient to say thata'fastening of the kind referred to comprises a screw, adapted to bedriven into a heel held against the heel seat of a lasted shoe, and anut threaded upon the shank of the screw and arranged to be screwed downinto en agement with the top of a last in the shoe a er the screw isdriven l into the heel.

It is an object of the present invention to 'i provide improved meansfor turning the screw and the nut, independently, in one operation.

With this object in view, an important feature of the invention consistsin the combination of a screw driver and a wrench mounted Iconcentrically, both tools being normally driven by a rotating powershaft, and special g5 connections being provided between the screwdriver and the shaft to permit operation of the screw driver to cease,after the screw is driven home, while operation of the wrench continues,to drive the nut home.

Inasmuch as the nut must progress axially along the screw when the nutis driven home after rotation of the screw has ceased, the inventionfurther provides, in combination, a reciprocable screw driver and anutturning Wrench which is reciprocable both with the screw driver andindependently thereof. In a convenient form of the invention the screwdriver may be arranged within the wrench, being normally substantiallyHush therewith but readily retractable and both the screw driver and thewrench being connected to the power shaft by yieldable clutches whichpermit-the required relative movements and independent operations of thetwo tools. Y

The fore oing and other features of the invention and the benefits to bederived from its use will be better understood and appreciated from thefollowing detailed description of a practical embodiment thereof whenread in connection with the accompanyingl drawings, in which Figure 1 isa view in front elevation, with parts shown in section, of a toolembodying the invention;

Fig. 2 is a perspective view of the wrench driving clutch disassembled;and

\ Fig. 3 is a similar view of the screw driving clutch.

In Fig. 1 of the drawings 10 indicates a rotate freely within acylindrical handle 24 in which the said shank portion of the wrench isjournaled, relative longitudinal movement of the handle and the wrenchbeing prevented by a cap 26 screwed upon the upper end of the wrenchshank, and a collar 28 secured to the wrench shank by -a set screw 30,thrust washers 32, 34 being interposed between the ends of the handleand the cap 26 and collar 28 respectively.

The handle 24 is adapted to be grasped by the operator, and power torotate the wrench 18 is derived from a rotating power shaft 36 which maybe driven in any suitable way as, for example, by the screw drivingshaft of a machine such as that disclosed in United States LettersPatent No. 1,7 22,992, granted August 6, 1929, upon .my applicationSerial No. 54,046, filed sept. 2, 1925.

The power transmitting connections between the shaft 36 and the wrench18 coluprise the clutch illustrated in Fig. 2. The

driving element 38 of this clutch consists of a sleeve surrounding theshaft 36 and pre- Vented from rotation relative thereto by theco-operntion of flat faces 40 formed upon the shaft with similar flatfaces 42 formed upon the interior of the sleeve. The lower ends of theclutch driving element 38 is formed with a series of teeth 44 arrangedto engage 1n notches 46 in the upper end of the driven element 48 of theclutch. 'Ihe driven element 48 also comprises a sleeve surrounding thepower shaft 36 and has projecting from lts side a spline 50 which isslidable longitudinally in a slot 52 formed in the wall of the wrenchshank 22.

It will now be apparent that rotation of the power shaft 36 will betransmitted to the wrench shank 22, and the wrench 18, by the clutchmembers 38, 48 as long as the teeth 44 are engaged in the notches 46.This engagement is effected and controlled by a longitudinally expansivespring 54, bearing against the lower end of the clutch member 48, towhich spring further reference will presently be made.

A screw driver head 56, formed for driving engagement with the head 12of the screw, is mounted within, and concentrically with, the wrench,the screw driver head being freely rotatable within the shank portion ofthe wrench and freely movable longitudinally thereof.

Power to rotate the screw driver 56 is derived from the power shaft 36by the agency of connections comprising the screw driving clutchillustrated in Fig. 3, wherein 58 designates the driving element and 60the driven element. The clutch driving element 58 consists of a sleevesurrounding the shaft 36 and movable longitudinally thereof butprevented from rotation relative thereto by the co-operation of a key62, secured in the shaft, with a slot 64 formed in the interior of thesleeve 58.

The lower end of the clutch driving element 58 is provided with notches66 which co-operate with teeth 68 projecting from the upper end of thedriven element 60 of the clutch which also consists of a sleevesurrounding the lower end of the shaft 36. The

' clutch element 60 is rotatable relatively to the shaft 36 but isprevented from longitudinal movement relative thereto by a shoulder 70formed upon the shaft and the enlarged head 72 of a retaining screwthreaded into the end of the shaft, between which shoulder and screwhead a reduced portion 74 of the clutch member 60 fits. The screw driverhead56 is screwed into the lower end of the driven element 60 of theclutch, which' and the wrench may be rotated at the same time or eithermay be rotated independently of the other, it being understood that thepower shaft 36 rotates continuously.

The teeth 44, 68 and the notches 46, 66 are so formed that each clutchwill transmit, without slipping, suiiicient power to drive the screw andnut, respectively7 but will yield and slip as soon as the screw and nutare driven home in order that damage or breakage may be avoided. v

In order topermit reciprocation of the screw driver and the wrench, bothtogether and independently, the power shaft 36, upon the lower end ofwhich the screw driver is supported, is arranged to slide axiallythrough a bearing 78 in the cap 26 which is screwed upon the upper endof the wrench shank 22. A loose sleeve 80 surrounds the shaft 36adjacent to the cap 26, and the upper end of a rather light expansivespring 82 bears against the lower end of said sleeve. The lower end ofthe spring 82 bears against a collar 84 secured to the shaft 36, thetendency of the spring 82 being to project the shaft downward until thescrew driver head 56 is about flush with the wrenchr 20. The spring 82,however, yields suliciently easily to permit the wrench to be moveddownward after the screw being driven by the screw driver hasencountered enough resistance to cease turning and, consequently, hasceased to move downward.,

In the use of the device the power shaft 36 rotates continuously. Thehandle 24 is grasped by the operator and the screw driver head 56 isengaged with the head of the screw, which will be driven home, whereuponthe screw driving clutch 58, 60 will yield and slip. Continued downwardpressure upon the handle will cause the wrench 18 to be projectedfurther downward, the wrench engaging and turnin the nut 16, causing itto progress axially a ong the screw until the nut is firmly seatedagainst the work, whereupon the wrench driving clutch 38 48 will alsoyield and slip. At this time both the screw andnut are driven home and,upon withdrawal of the tool, the spring 82 projects the screw driver toits original, normal position ready for operation upon the next screw.

Having described the invention, what is claimed as new and desired to besecured by Letters Patent is:

1. In a screw and nut driving device, the Combination of a rotatingpower shaft, a screw driver. and a wrench concentric with each other andboth normally driven by said shaft, and connections between the screwdriver and the shaft permitting operation of the screw driver to ceasewhile operation of the wrench continues.

2. In a screw and nut driving device, the

screwdriver and a wrench both mounted concentrically with said shaft andboth normally driven by the shaft, and connections between the screwdriver and the shaft permitting operation of the screw driver to ceasewhile operation of the wrench continues.

3. In a screw and nut driving device, the combination of a rotatingpower shaft, a screw driver and a wrench concentric with each other, andindividual clutches connecting the screw driver and wrench res ectivelyto said shaft, said clutches being a apted toyield and slipindependently of each other, whereby both a screw and a nut upon thescrew may be driven home independently in one operation. y

'4. In a screw and nut driving device, the combination of a rotatingpower shaft, a screw driver, a wrench, two clutches, the driving elementof each clutch being constrained to rotate with the power shaft and thedriven elements ofthe clutches transmitting force respectively to thescrew driver and the wrench, and a spring common to both clutches forpressing their driving and driven elements into driving engagement witheach other.

5. In a screw and nut drivin device, the combination of a hollow hand e,a wrench mounted to rotate in the handle, a screw driver mounted torotate within the wrench, a power shaft mounted to rotate within thewrench relatively to the screw driver, both the screw driver and theshaft being axially movable relatively to the wrench, and clutchesconnecting the shaft to the wrench and the screw driver, respectively.

6. In a screw and nut driving device, the

combination of a hollow handle, a wrench mounted to rotate in thehandle, a screw driver mounted to rotate within the wrench, a powershaft mounted to rotate within the wrench relatively to the screwdriver, both the screw driver and the shaft being axiall mov ablerelatively to the wrench, and ciitches connecting the shaft to thewrench and the screw driver, respectively, an element of one clutchbeing 'splined to the shaft and an element of another clutch beingsplined to the wrench.

In testimony whereof I have signed my name to this s ecification.

FREERIC E. BERTRAND.

